doc: typo 'formatted' in codingstyle.rst

%s/formatted/format/

Fixes: 4211fb2ef6dd ("doc: Migrate CodingStyle wiki page to Sphinx")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/doc/develop/codingstyle.rst b/doc/develop/codingstyle.rst
index 2b13818..a6bc37b 100644
--- a/doc/develop/codingstyle.rst
+++ b/doc/develop/codingstyle.rst
@@ -41,7 +41,7 @@
 
     * The exception here is Python which requires 4 spaces instead.
 
-  * All source files need to be in "Unix" and not "DOS" or "Windows" formatted,
+  * All source files need to be in "Unix" and not "DOS" or "Windows" format,
     with respect to line ends.
 
   * Do not add more than 2 consecutive empty lines to source files